Maven plugin not working in RAD 8.5

I have multiple web projects which have inter dependencies. Any Maven action on any module produces the following error.

An internal error occurred during: "Updating Maven Project". org/eclipse/core/runtime/preferences/InstanceScope.INSTANCE

I tried the following to resolve, but nothing helped.

cleaned up using mvn clean.
In the RAD deleted the projects and re-imported them as maven projects.

Even tried deleting the workspace metadata. Not sure what is going on. Any help?

Solution

I completely reinstalled RAD and tried many M2E update sites, everything was erroring out looking for some dependencies. What worked for me is the below site, simple no fuss:

Sonatype M2E

also posting SVN plugin someone looking for both build and version plugins

SVN eclipse plugin